PRE-TUNING CHECK LIST. STREET
Check for tight intake and tight exhaust. [Vacuum leaks and exhaust
a. Do that by either smoke check or use shop pressurized air.
b. The tuner might be able to perform this service [for a fee] if you are not equipped.
Verify fuel pump and fuel pressure is sound and proper.
Ensure you have fresh O2 sensors
Install new spark plugs and gap as required for the mods and verify good plug
Have a list of all of the modifications for your tuner. Note the mods in
Donít forget things like rear gear ratio, tire size, throttle body size, fuel injector data.
Driveshaft and U-joints in good condition.
Verify spark timing with a timing light. Take the time to find top dead
center and install a timing pointer at the crank damper. If you
donít have the ability to check timing with a timing light because commanded
timing jumps around too much then the dyno shop can force your ECM to command a
steady timing and they can check. At the very least install the timing pointer
and verify TDC.
Verify battery voltage and good alternator charging.
Good condition and proper air pressure
Fresh engine oil change. Fuel
or dirt in the oil is not desired, especially during strip or street or dyno